It's American.
heat
Lack of lubrication.
The most likely cause is the turn signal flasher.
ON the 2006 impala that whining noise is actually the electronics when you accelerate. Its more or less electronic pulses/signals My 06 Impala is the same.
directional arm
Rocker cover gaskets need to be replaced.
Not usually. If the rocker arms are loose because the cam lobes are worn down, that could be an indication of a worn engine, which might have bad rings or loose valve guides, which would cause an engine to smoke.
My 72 Impala's trunk will fill with water because the rear window seal leaks My 72 Impala's trunk will fill with water because the rear window seal leaks
The most probable answer is that you have a bad flasher.
Collapsed hydraulic valve lifter? Rocker arm (valves) need adjusting?
Your A/C needs recharged.
Worn out rocker nut?